Somebody pls help me for question a. i will mark u as brainliest. promise. a) simplify (cosec^2 a-1) (sec^2 a sin^2 a)

Which of the following is correct interpretation of the expression -4+13

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25

What are the domain and range of the function below? a) domain: (-4,0) range: [-2,infinity) b) domain: (-3,0) range: [-2,infinity) c) domain: (-infinity,infinity) range: [-2, infinity) d) domain: [-2,infinity) range: (-infinity,infinity)